Mewtwo-Mega-Y @ Choice Specs  
Ability: Shadow Tag  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sludge Wave  
- Searing Shot  
- Freeze-Dry  
- Bug Buzz  

Rayquaza-Mega @ Choice Specs  
Ability: Gale Wings  
EVs: 248 HP / 252 SpA / 8 Spe  
Modest Nature  
IVs: 0 Atk  
- Chatter  
- Oblivion Wing  
- Trick  
- Taunt  

Scizor-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Milk Drink  
- Defog  
- U-turn  
- Magic Coat  

Mewtwo-Mega-X @ Choice Scarf  
Ability: Shadow Tag  
EVs: 252 Atk / 252 Spe  
Adamant Nature  
- Drain Punch  
- Precipice Blades  
- Bolt Strike  
- Knock Off  

Arceus-Water @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 8 Spe  
Bold Nature  
IVs: 0 Atk  
- Chatter  
- Parting Shot  
- Aromatherapy  
- Roost  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 242 HP / 252 Def / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Will-O-Wisp  
- Taunt  
- Parting Shot  
- Soft-Boiled